Photogravure process for preparing a gravure press for multicolor printing

ABSTRACT

A color percentage breakdown is made of the original art work in conformance with the color breakdown of the inks which will be employed in printing such art work. A color negative of the original art work is then made and placed in a color analyzer capable of producing a positive television image from the negative. The settings of the analyzer are adjusted until the television image is as close as possible to the original art work. The color settings so arrived at on the analyzer are corrected to conform to the readings of the color percentage breakdown made of the original art work. These corrected color settings are fed into a negative translator capable of producing for each color in the original art work the exposure condition required to make a separate picture print of such color. The negative translator is used with an enlarger and a three color filter to successively expose sheets of color print paper sensitive to the required color lights necessary to produce separate color prints, a key color print and a master color print of the original art work. The master color print is compared with the original art work and if any corrections are to be made this is done either by retouching the color prints, or by manipulating the dials of the color negative analyzer to readjust the color balance in the television image, whereupon new separate and master color prints are made using the thus adjusted dial readings of the color negative analyzer. The corrected positive paper color prints are then converted into paper color black and white negatives which are employed to provide the images to be inked on the printing cylinders of the press.

United States Patent [191 Howland et a1.

[ Oct. 21, 1975 PHOTOGRAVURE PROCESS FOR PREPARING A GRAVURE PRESS FORMULTICOLOR PRINTING [76] Inventors: Howard Howland, 88 Clinton Place,

Hackensack, NJ. 07601; Frank Pfleger, 2 Oak Place, Waldwick, NJ. 07463[22] Filed: Aug. 22, 1974 [21] App]. No.: 499,488

[52] US. Cl. 101/211; 96/30 Primary Examinerl-1arland S. SkogguistAttorney, Agent, or Firm-John J. Hart [57] ABSTRACT A color percentagebreakdown is made of the original art work in conformance with the colorbreakdown of the inks which will be employed in printing such art work.A color negative of the original art work is then made and placed in acolor analyzer capable of producing a positive television image from thenegative. The settings of the analyzer are adjusted until the televisionimage is as close as possible to the original art work. The colorsettings so arrived at on the analyzer are corrected to conform to thereadings of the color percentage breakdown made of the original artwork. These corrected color settings are fed into a negative translatorcapable of producing for each color in the original art work theexposure condition required to make a separate picture print of suchcolor. The negative translator is used with an enlarger and a threecolor filter to-successively expose sheets of color print papersensitive to the required color lights necessary to produce separatecolor prints, a key color print and a master color print of the originalart work. The master color print is compared with the original art workand if any corrections are to be made this is done either by retouchingthe color prints, or by manipulating the dials of the color negativeanalyzer to readjust the color balance in the television image,whereupon new separate and master color prints are made using the thusadjusted dial readings of the color negative analyzer. The correctedpositive paper color prints are then converted into paper color blackand white negatives which are employed to provide the images to be inkedon the printing cylinders of the press.

8 Claims, 8 Drawing Figures U.S. Patent Oct. 21, 1975 3,913,477

FIG.8

PHOTOGRAVURE PROCESS FOR PREPARING A GRAVURE PRESS FOR MULTICOLORPRINTING This invention relates to multicolor printing by a gravurepress and more particularly to a photogravure pro cess for preparing thecolor prints which are employed in the production of multicolor imageson the printing cylinder of a gravure press.

The preparation of color prints of the indicated type in accordance withpresent practice is a tedious and costly procedure as it involves alarge number of steps and the use of costly color separation machines.Further, from the time work is commenced on an original layout submittedby a customer it usually takes a weeks time when following presentpractices before a colored copy of the proposed final print can besubmitted to a customer for his consideration.

A primary object of this invention is to provide an im proved methodwhich will enable a color print to be produced on a gravure press within24 hours after a customer has submitted an original layout.

Another object of the invention is to provide an improved photogravuremethod having substantially fewer steps than those now required in thepractice of presently known photogravure methods and capable of beingcarried out with the use of inexpensive materials.

A further object of the invention is to provide an improved photogravuremethod capable of being practiced without the use of expensive colorseparation machines.

Other objects of the invention as well as the advantages thereof willappear from the following description when read in connection with theaccompanying drawings, in which FIG. 1 is a diagrammatic plan view of anoriginal art layout;

FIG. 2 is a view similar to FIG. 1 and showing the layout overlaid witha prepunched clear film;

FIG. 3 shows a prepunched black sheet of paper superimposed on thelayout and film of FIG. 2, the film and black sheet together forming amask to be employed in making the color prints;

FIG. 4 is an enlarged plan view of the original art in the layout ofFIG. 1;

FIG. 5 is a plan view indicating the manner in which the colorpercentage breakdown of the original art is recorded on clear film;

FIG. 6 is a plan view of the clear film on which such recordation ismade;

FIG. 7 is an exploded diagrammatic view illustrating the steps employedin making the color prints from the original art; and

FIG. 8 is an exploded diagrammatic view illustrating the making of thecolor negatives for use in forming the printing cylinder.

It is believed advisable to initially point out that under the practicepresently followed by the art, when vthe usual printing establishmentreceives from a customer either the original artwork which is to beprinted, or a dummy or layout provided with original artwork, suchestablishment first causes a color transparency copy to be made of thework that has been submitted by the customer. The color transparencyfilm on which such copy is produced is usually made by an outsidelaboratory and when it is received from the latter, is put on a scanningmachine capable of bringing the size of the copy to the size of theoriginal work and of making a series of separated negatives of the red,yellow, blue and black colors in the work. Instead of using a scanningmachine, it is also a common procedure for print ing establishments touse the original reflective art copy instead of having a transparencymade and put the reflective art copy on a copy board on which has beenmounted a camera of known construction capable of producing a series ofcolor separation negatives of red, yellow, blue and black.

Whichever of the above described procedures is utilized, the resultingcolor separation negatives of red, yellow, blue and black are sent to alayout department of the printing establishment where they are assembledwith all of the other elements of the original layout so that suchassembly conforms to the original layout. In order to bring the coloringof the original art depicted by such assembly into as close conformanceas possible with the original artwork, the assembly is sent to theestablishmentsretouch department where the required color corrections oneach negative is made to bring about this result. The retouched colorseparations are then sent to a photographic department equipped to makea positive film print from each of the red, yellow, blue and blackretouched negatives. The positives thus obtained are sent back to theretouch department where the red, blue, yellow and black are checkedcolorwise with the original color breakdown of the original art work.This is done by the use of a densimeter which gives the density readingsand these readings are compared with the original color breakdown andthe positives are then marked up for additional correction. Thesecorrected positives are then sent to a department for mounting them in alayout arrangement known as an imposition layout and which conforms tothe printed layout which is to be produced in a particular book ormagazine. This imposition layout is then sent to the department formaking the rotogravure or roto film. At this department, each of thecolor separated positives in the composition layout is exposed to obtainnegatives of such positiveprints. These rotofilm negatives are sent towhat is known as the lay down department in the establishment where eachis precisely located on the printing cylinder to be used in printing itsparticular color and adhered thereto with the film of photographicmaterial thereof in contact with the surface of the cylinder and thefilm backing of such negative covering the film material.

After each negative rotofilm has been properly secured in position on aprinting cylinder in the manner stated, the backings of such rotofilmare removed, leaving the photographic material on the cylinder. Thephotographic material on each cylinder is dried and then subjected tothe customary acid treatment to etch in each cylinder the image to whichis to be applied the particular color ink for which it was made in theprinting operation. The thus etched four color cylinders are mounted inthe proving press and a composite printing of the layout made. A sampleof this composite printing is compared with the original artwork and ifit is found to be substantially satisfactory, it is sent to the customerfor comment.

Usually however, the sample of the initial master or composite print isfound to be so far removed from the original art work that it cannot besent to the customer without first making certain color corrections.This is done by first marking up specimens of the composite andseparation proof prints to bring them as close as possible intoconformance with the original work. The color correction markedcomposite and separation proof prints are then sent back to the retouchdepartment where the actual color corrections are made on the yellow,red, blue and black original positives to bring them to the conditionindicated on the marked proof sheets. After being so corrected theoriginal positives are sent back to the mounting department to beremounted in proper position and registration. The completed mounting issent back to the roto film department where new exposed roto films aremade of the yellow, red, blue and black. The above described procedurewith respect to the laydown, etching and printing is then followed.

It is evident that the practice of the foregoing procedure is tedious,costly and time consuming and because of such factors unsatisfactory forboth the customer and the printer. These disadvantages of the presentpractice of preparing a gravure press for the printing of multicolorprints are avoided by the use, in accordance with the present invention,of known readily available color print paper and working with colorinstead of the black and white tones of the color separations employedin the present practice. It has been found that when working with suchcolor positive prints cleaner separations can be made in fewer stepsthan possible with the usual practice of making color separations withthe use of film so that it is possible to provide a more accuratereproduction of the original art work in a relatively short periodof'time.

.In accordance with the present invention, the original layout which issent by the customer and which is of the correct size, is used initiallyto prepare a mask which is of the same size as the original layout andwhich is to be employed in the making of positive color separationprints and a master color print of the original artwork or illustration14 of the layout. In employing the original layout 10 for such purposes,it is mounted on lugs 11,11 provided on a suitable backing and overlaidwith a 0.004 Cronar clear film 12 which is of the same size as theoriginal layout and is also mounted on the lugs 11,11. The film isprepunched to provide an opening 13 which is similar in shape to and inregistration with the multi-colored illustrated area 14 of the layout.Superimposed on and adhered to the clear film 12 is a sheet 15 of blackpaper similar in size to the film 12 and prepunched to provide anopening 16 having a shape similar to the illustration l4 and the filmopening 13 and in registration therewith. The com posite sheetcomposedof the film 12 and the black sheet 15 form a mask 20 which is to beutilized in covering unexposed sheets of Ektacolor print paper of thesame size as the original layout during the making of the separateprints of the colors in the illustration l4 and the master color printthereof.

In FIG. 4 of the drawings, the original art illustration 14 is shown forthe purposes of illustration as containing four color areas, i.e., ablue area 21, a green area 22, an orange area 23 and a yellow area 24.In the preparation for making color separations of the illustration 14,the latter is mounted on the pegs 25 ofa copy board and over suchillustration is placed a 0.004 Cronar clear film 26 prepunched to bereceived by the pegs 25 and having an illustration covering area similarto the area of the illustration 14 (FIG. 5). Onthis clear film 26 isrecorded the color percentage breakdown of the illustration using aconventional swatch book or color chart containing the color breakdownof the inks being used in the printing plant to which the customer senthis layout. Thus, as shown more clearly in FIG. 6 of the drawings, theoperator may mark the portions of the film 26 covering each colored areaof the illustration with a circle having marked on the film inassociation therewith the color percentage breakdown for its associatedarea. For example, the film 26 may be marked with a circle 27 for theblue area and having marked in association therewith the notation blue1.60, for the green area a circle 27' and the notation yellow 0.80, blue0.40, for the orange area a circle 27" and the notation yellow 0.60, red0.30 and for the yellow area a circle 27" and the notation yellow 0.35red 0.30.

After the color breakdown of illustration 14 has been so recorded on theclear film 26, the latter is removed from such original art illustrationand a picture is taken of illustration 14 by a camera 28 loaded with anunexposed Kodacolor or Ektacolor film negative 29 or any other suitableknown color photographic film. It is known that color negatives of thistype are each constituted of a plurality of cyan, magenta and yellowcolor layers which are subtractive colors and contain a filter andmasking system to cause a separation of the colors of the illustrationduring the exposure of such negative. Then the exposed negative 29 hasbeen processed in the customary manner, it is placed in a machine 30capable of transposing the exposure on the negative 29 into a highquality positive television image, such as the image 31 shown in FIG. 7of the drawings. Any suitable television color analyzer, such as theKodak Video color negative analyzer, can be utilized for this purpose.The television image 31 is then compared with the original art work andif any of the colors in the image are off, the settings on the machine30 which are calibrated, are manipulated to adjust the color balance,brightness and density of the image and also to change the red, greenand blue values of the image to bring it into conformity with theoriginal art work as much as possible. After this has been done, thesettings on the machine 30 are readjusted using the color ink readingswhich were recorded on the film 26, to correct such settings for thetelevision image of the original art work into settings which take intoaccount the color breakdown of the inks which will be used in theprinting of such color image.

The thus adjusted settings on the Kodak color negative analyzer 30 arethen used to produce the exposure conditions required to make separatepicture prints of the colors which are contained in the original artcopy 14, but in which prints the colors are shown as made with dyesconforming to the ink readings on the,film 26. The proper exposureconditions for making each color print is obtained by feeding dataobtained from the analyzer 30 into a negative translator 36 of the typemake by the Eastman Kodak Company. The exposure conditions for suchcolors are then utilized to control the exposure needed to make a printof such color using an enlarger 37 of conventional construction. Thus,in the use of these two devices, the exposed Ektacolor or Kodacolornegative 29 is placed in the enlarger 37 for any reduction orenlargement in size required to bring the color exposures to the size ofthe opening 16 in the mask 20. The intensity of the'light'for each colorwhich has been determined by the negative translator 36, is thendirected on the enlarger 37; the

colorbalance for each print being adjusted in accordance with thereadings in the Videocolor negative analyzer 30. The four colorexposures made with the use of the translator 36 and enlarger 37 arepassed through tricolor filters of known construction, such as the onemade by the Eastman Kodak Company. Such tricolor filters are usuallyconstituted ofa blue filter 38, a green filter 39 and a red filter 40.The light passes from the filters on each exposure to one of fourprepunched pieces 41, 42, 43 and 44 of unexposed color print paper. Thecolor print paper pieces 41-44 are each mounted successively on the malelugs or the vacuum holding surface of a conventional register board 45provided in the enlarger 37. Any suitable existing color print papersensitive to blue, green and red light may be employed to make thepieces 41-44, such as the Eastman Kodak Ektacolor print paper. On top ofeach unexposed print paper piece during the exposure thereof is placedthe initially made mask 20. v

It will be understood from the foregoing that during the separateexposures of the color prints 41-44 in the enlarger 37, each of thethree colors which go to make up the original art piece 14 is exposed onone of three color prints, for example the color prints 41, 42 and 43.In addition a fourth color print 44 is exposed to form a blue key: colorprint. While in FIG. 7 of the drawings there has been shown for purposesof illustration all of the four color prints 41-44, it is to beunderstood, that such prints are exposed one at a time on the registerboard 45 provided in the enlarger 37. It will also be understood thatsuch individual color prints are made by the exposure of one colorsensitive layer only on each of the color print papers 41-44 with theuse of the tricolor filters 38-40. Thus, the yellow layer of the print41 is exposed by using the blue filter 38 to make the yellow colorpositive print; the red layer of the print 42 is exposed by using thegreen filter 39 to make the red color positive print, and the blue layerof the print 43 is exposed by using the red filter 40 to make the bluecolor positive print. The half strength blue color positive is formed onthe print 44 by using the red filter 40 to expose the blue layer of suchprint 44.

A fifth Ektacolor color print paper piece 46 is then mounted on theenlarger 37 with the mask and all of the individual color layers thereofare subjected to exposure by using the three blue, green and red colorfilters 38, 39 and 40, respectively, individually to expose each of suchcolor layers and thereby make one master color positive print of thetelevision image produced by the analyzer 30. In making such successiveexposures to form the. master color print, the exposure data from thetranslator 36 is also used. The resulting master color print 46 is thencompared with the original art copy 14 to determine if any colorcorrection is needed. If the positive master color print 46 is found toclosely conform to the original art copy it is sent to the customer forcomment before the printing cylinders are prepared for printing thework. If it is required either as a result of such check, or because thecustomer from his examination of the master color print requests it, tomake a correction in any of the colors in the master color print, thiscan be done in either of two ways. Thus, if the correction is of a minornature, or can readily be accomplished by retouching one of the positivecolor prints 41-44, this would be the simplest procedure to follow. Onthe other hand, if the correction is of a more complicated nature, orthe customer desires to see a corrected master color print beforeproceeding to the printing of the layout, the required correction forany color is made by manipulating the dials of the color negativeanalyzer 30 to readjust the color balance in the television image to theextent desired. When the image makes a satisfactory showing, thereadjusted settings of the analyzer 30 are fed into the translator 36 inthe manner above described to obtain the new exposure conditions neededin the enlarger 37 to make an adjusted master color print. During themaking of the new master color print there may be made the new colorprints 41-44, or the making of such prints can await the approval by thecustomer of the new master color print. It is also advisable when theadjustment of the readings on the analyzer 30 have been obtained, tomake at that time an adjustment of the readings on the film 26 so thatthe inks employed in the.

plant to make the printing will conform to the readjusted settings onthe analyzer 30.

It will be noted from the foregoing, that in the practice of the methodof this invention, the operator is working at all times in color and notin black and white, to bring the color prints from which the printingcylinders are made, into the condition in which a printed compositethereof will conform to the desired reproduction of the original artwork. Thus, initial readings and settings are made to produce in colorusing the inks employed by the plant, prints which can readily becompared with the original art work. Ordinarily, it may prove morepractical to make first a positive master color print and have itapproved before making the color prints of the separate colors in theart work. But other operators may feel it more desirable to proceed asabove described and make all five color prints at the same time.Whichever procedure is followed, any corrections, whether made on thepositive prints of the individual colors, or by going back to adjust thesettings of the analyzer 30 to conform to the color ink readingsrequired to bring the colors of the prints into conformance with colorchanges desired by the customer using the color inks employed in theplant, such changes are made in color and not in black and white. Thisrenders it easier for the operator to process the work and enables himto arrive more speedily at accurate printable images for reproducing theoriginal art work in printed form. The accuracy of these reproductionsis further assured by the fact that in the practice of the process ofthis invention there is made a two step separation of the colors in theoriginal work. As previously indicated the fact that the type of colornegative employed in the use of the camera 28 is constituted of aplurality of layers of the colors cyan, magenta and yellow, there occurswhen such exposed negative is mounted in the enlarger 37 to form thepositive color prints 41-44, an initial separation of the colors in theoriginal art work due to such color layers in the exposed negative, andsuch separations are subjected to the exposures corrected to thereadings made for the inks employed in the printing plant. A secondaryseparation takes place when the light beams are passed through thetricolor filter 38, 39 and 40 of the enlarger 37. This two stepseparation will provide cleaner and sharper separations on the colorprints, thereby making possible more accurate reproductions of the colorimages forming the original art work.

' When the positive yellow, red, blue and blue key color prints 41-44,respectively, have in the manner above described been placed in a formsatisfactory to the customer before starting any work on theconstruction of the printing cylinders, they are then utilized toproduce the required images on the printing cylinders of the gravurepress to be employed in making the printed reproductions of the originalwork. To accomplish this the color prints 41-44 are first converted intoindividual negatives. As is shown in FIG. 8 of the drawings, this may bedone by successively placing each of the yellow, red, blue and blue keypositives 4144 on the copy vacuum board 50 ofa conventional large camera 51 loaded with an unexposed paper negative 52 suitable for thepositive being photographed, for example, the yellow positive 41. Thepaper negatives 52 are of the same size as the positives 41-44 and likethe latter are prepunched to enable them to be mounted on a registerboard 55. Also in making such paper negatives, the exposure time usedfor making each negative is that computed by the color translator 36using the original exposure date recorded on the record sheet 26, or thecorrected settings of the analyzer 30 and employed in making the finalcolor positives 41-44. There is also taken into consideration the lightsource of the camera and the necessary adjustment of exposure time tolamp distance. In this manner the exposures utilized are of suchcorrectness that there is obtained in black and white tone on thenegatives the true color tone of the individual color positives. Thefour individual color paper black and white negatives obtained in thisfashion ofyellow, red, blue and blue key, are designated 41, 42 43 and44, respectively, in FIG. 8 of the drawings. These individual colorpaper black and white negatives may now be mounted on the scanningcylinder of known electronic printing cylinder engraving mechanism toform the images on the printing cylinders for the type of gravureprinting press in which they are to be installed.

The above description is primarily concerned with the original art workof the layout. In preparing the remainder of the layout for printing, ablack prepunched mask, is prepared in the manner of the mask except thatinstead of the opening 16 in the latter, such mask is made with anopening conforming to the area occupied by the remainder of the layout.If the remainder of the layout is constituted of black print, a thinbased black negative film of 0.004 Cronar, prepunched to the size of theoriginal layout, is subjected for exposure using the layout covered bythe layout mask. This exposed negative is placed over the blue keynegative 51 when the latter is mounted on the scanning cylinder of theengraving mechanism when forming the half tone image cylinder to beemployed in the gravure press. In the event that the remainder of thelayout is varicolored, for example, constituted of color print andbackground, separate color and master prints are prepared following theprocedure above described with respect to the'original art work, butemploying the above mentioned layout mask in the preparation of thepositives and negatives of such layout remainder.

What is claimed is:

1. The method of preparing a gravure press for multicolor printing whichcomprises making a record of the color percentage breakdown of anoriginal art work using means showing the color breakdown of the inks tobe used in printing the original art work, preparing a negative of theoriginal art work using a given color photographic film, placing thecolor negative in a color analyzer capable of producing a positive colorimage therefrom, correcting the settings made on the color analyzer toproduce such image to conform to the readings in said record of colorpercentage breakdown, feeding the corrected color analyzer settings intoa negative translator capable of producing the exposure conditions forthe colors in the original art work, using said color negative and suchexposure conditions and given color filters to produce on color printpaper positives of the separate colors in the original art work and of acomposite of such colors, checking and correcting the colors of suchcolor positives to bring them into conformance with the desiredreproduction of the original art work, and preparing from the finalcorrected positives paper black and white negatives for use in formingthe required images on the printing cylinders for reproducing theoriginal art work.

2. The method defined in claim 1, including preparing for the originallayout a mask having an opening revealing only the original art workappearing on such layout, and covering with said mask each of the piecesof color print paper during the exposure thereof to the light passingthrough the color filters.

3. The method defined in claim 1, including controlling the lightdirected through the color negative to the color print paper to bringthe color exposure to the size of the opening in the mask.

4. The method defined in claim 2, in which said paper negatives are madeof a size similar to the size of the original layout, and covering withsaid mask said paper negatives during the exposures thereof to producethe exposed black and white negatives of the original art work.

5. The method defined in claim 1, in which a positive colored televisionimage is produced from said color negative, adjusting the settings ofthe color analyzer to obtain a high quality image, and bringing suchtelevision image into as close conformity to the original art work aspossible before correcting such analyzer settings.

6. The method defined in claim 1, including retouching the color printpaper positives of the separate colors in the original art work to bringthem into a condition necessary for the desired reproduction of theoriginal art work.

7. The method defined in claim 1, including after a check of the colorprint paper positives readjusting the settings of the color analyzer toreadjust the color balance of the image produced thereby, feeding suchreadjusted color analyzer settings into the negative translator toobtain new exposure conditions, and utilizing such new exposureconditions to produce new color print paper positives.

8. The method defined in claim 7, including revising said record of thecolor percentage breakdown to conform to the readjusted color analyzersettings, and using printing inks conforming to such revised recordreadings in the reproduction of the original art work.

1. The method of preparing a gravure press for multicolor printing which comprises making a record of the color percentage breakdown of an original art work using means showing the color breakdown of the inks to be used in printing the original art work, preparing a negative of the original art work using a given color photographic film, placing the color negative in a color analyzer capable of producing a positive color image therefrom, correcting the settings made on the color analyzer to produce such image to conform to the readings in said record of color percentage breakdown, feeding the corrected color analyzer settings into a negative translator capable of producing the exposure conditions for the colors in the original art work, using said color negative and such exposure conditions and given color filters to produce on color print paper positives of the separate colors in the original art work and of a composite of such colors, checking and correcting the colors of such color positives to bring them into conformance with the desired reproduction of the original art work, and preparing from the final corrected positives paper black and white negatives for use in forming the required images on the printing cylinders for reproducing the original art work.
 2. The method defined in claim 1, including preparIng for the original layout a mask having an opening revealing only the original art work appearing on such layout, and covering with said mask each of the pieces of color print paper during the exposure thereof to the light passing through the color filters.
 3. The method defined in claim 1, including controlling the light directed through the color negative to the color print paper to bring the color exposure to the size of the opening in the mask.
 4. The method defined in claim 2, in which said paper negatives are made of a size similar to the size of the original layout, and covering with said mask said paper negatives during the exposures thereof to produce the exposed black and white negatives of the original art work.
 5. The method defined in claim 1, in which a positive colored television image is produced from said color negative, adjusting the settings of the color analyzer to obtain a high quality image, and bringing such television image into as close conformity to the original art work as possible before correcting such analyzer settings.
 6. The method defined in claim 1, including retouching the color print paper positives of the separate colors in the original art work to bring them into a condition necessary for the desired reproduction of the original art work.
 7. The method defined in claim 1, including after a check of the color print paper positives readjusting the settings of the color analyzer to readjust the color balance of the image produced thereby, feeding such readjusted color analyzer settings into the negative translator to obtain new exposure conditions, and utilizing such new exposure conditions to produce new color print paper positives.
 8. The method defined in claim 7, including revising said record of the color percentage breakdown to conform to the readjusted color analyzer settings, and using printing inks conforming to such revised record readings in the reproduction of the original art work. 